JP2000274580A - Jig for seal tape removal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jig for seal tape removal capable of perfectly removing a seal tape wound around a tube fitting from the once used tube fitting. SOLUTION: An upper fixed blade 3, a lower fixed blade 4, a first movable blade 5 and a second movable blade 6 arranged in such a way as to surround an installing position of a tube fitting are furnished, the first movable blade 5 and the second movable blade 6 constitute a link mechanism, the first movable blade 5 and the second movable blade 6 are interlocked with each other by this link mechanism and knife edges 5A and 6A are moved in a direction to be released from the inside of a support hole 2A, the tube fitting comes to be free to be inserted into the inside of the support hole 2A, the first movable blade 5 and the second movable blade 6 are moved in a direction where the knife edges 5A and 6A intrude from the inside of the support hole 2A, knife edges 3A, 4A, 5A, 6A are respectively engaged with thread grooves of the tube fitting, and a seal tape is removed by rotation of the tube fitting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a jig for removing a seal tape wound around a thread portion of a pipe joint.

[0002]

Generally, many pipe joints are connected to pipes for supplying air and other fluids for connecting pipes and connecting various valves and instruments. For example, in instrumentation work, many measuring instruments such as pneumatic industrial instruments, regulating valves, and solenoid valves use clean air with a low dew point as measuring air, and reduce the measuring air to the required pressure. To supply instruments
Various devices such as a hand valve, a filter, a pressure reducing valve, and a pressure gauge are connected via a pipe joint between a supply source of measurement air and instruments. In addition, many pipe joints are also used for supply pipes for high-pressure air and supply pipes for gases and liquids other than air.

When a pipe joint is connected to a pipe for supplying such a fluid, a Teflon-made sealing tape is wound around a thread portion of the pipe joint in order to maintain confidentiality in the pipe.
This seal tape prevents leakage of fluid from inside the pipe by filling a gap between the pipe joint and the thread of the pipe that are screwed together. A pipe joint wound with such a seal tape may be removed after being connected to the pipe and used again.In such a case, the old seal tape wound around the pipe joint is removed. Need to wrap a new seal tape. In particular,
Such an operation is frequently required in the instrumentation operation.

However, when the sealing tape is wound around the thread of the pipe joint and tightened, the sealing tape is strongly pressed against the thread of the pipe joint by the tightening pressure, and is removed from the pipe joint removed from the pipe. And the time required to remove it is very long. If the seal tape is not completely removed from the pipe joint, a defective tightening may occur when the tape is used again, and fluid may leak out of the pipe.

[0005] Further, if a new seal tape is wound and a pipe joint is used without completely removing the old seal tape, it becomes difficult to screw the thread portion of the pipe joint together, and it is also difficult to cut the screw when tightening. For example, a piece of the seal tape may enter the pipe due to, for example, causing a failure of various devices connected to the pipe.

[0006] The present invention has been made to solve the problem when the pipe joint wound with the seal tape is reused. That is, an object of the present invention is to provide a jig for removing a seal tape which can completely remove a seal tape wound around the pipe joint from a pipe joint once used.

[0007]

According to a first aspect of the present invention, there is provided a jig for removing a seal tape wound around a thread portion of a pipe joint in order to achieve the above object. A support member rotatably supporting the pipe joint about its axis, and engaging with the thread groove of the pipe joint rotatably supported by the support member, and along the thread groove with rotation of the pipe joint. And a cutter member that moves relatively.

The jig for removing a seal tape according to the first aspect of the present invention is a state in which a pipe joint on which a seal tape is wound is rotatably supported by a support member, and a cutter member is engaged with a thread groove of the pipe joint. Then, the pipe joint is rotated around its axis. As a result, the cutter member relatively moves along the thread groove of the pipe joint, whereby the seal tape attached to the thread groove is peeled off by the cutter member.

As described above, according to the first aspect,
Even when the seal tape is strongly pressed into the thread groove of the pipe joint due to the pressure at that time when the pipe joint is tightened into the pipe, this seal tape can be easily peeled from the thread groove. Thereby, the sealing tape can be completely removed from the pipe joint, and the working time for the removal can be greatly reduced.

According to a second aspect of the present invention, there is provided a jig for removing a sealing tape, in addition to the configuration of the first aspect, wherein the support member is arranged so as to surround a fitting position of the pipe joint. A cutter moving member for moving the cutter member in a direction of moving the cutter member toward and away from other cutter members is attached to at least a part of the plurality of cutter members, When the cutter member is moved in the direction away from each other by the cutter moving member, the pipe joint becomes freely insertable between the cutter members, and when the cutter member is moved in the direction approaching each other by the cutter moving member, the cutter member Each of the cutter members is engaged with a thread groove of the pipe joint inserted between them, thereby supporting the pipe joint from the periphery.

In the jig for removing a seal tape according to the second aspect of the present invention, the seal tape is removed by a plurality of cutter members arranged so as to surround the fitting position of the pipe joint. It is positioned at a predetermined position to be performed, and is rotatably supported.

When the pipe joint is supported by the cutter member, the cutter member is moved in the direction away from each other by the cutter moving member, and the pipe joint is inserted between the cutter members. The pipe joints are moved toward each other to engage with the thread groove of the inserted pipe joint.
Similarly, release of the pipe joint from the supporting state by the cutter member is performed by moving the cutter member in the direction of coming and coming from each other by the cutter moving member.

As described above, according to the second aspect,
The pipe joint from which the seal tape is to be removed can be supported at a predetermined position only by the cutter member for removing the seal tape from the pipe joint, and the fitting of the pipe joint and the engagement of the cutter member with the pipe joint can be performed. Since it can be performed simultaneously, the sealing tape removing operation can be performed easily and in a short time.

According to a third aspect of the present invention, in order to achieve the above object, in addition to the configuration of the second aspect, the sealing tape removing jig is provided with the cutter moving member in a direction in which the cutter members approach each other. A biasing member for biasing is attached.

In the jig for removing a seal tape according to the third aspect of the present invention, when the pipe joint from which the seal tape is to be removed is attached to the seal tape removal position, the cutter moving member is moved in the direction of the bias of the biasing member. After the pipe joint is moved to the position where the seal tape is removed by operating in the opposite direction, the constraint on the cutter moving member is released.

With this arrangement, the cutter moving member moves the cutter member in the direction of engaging with the pipe joint by the urging force of the urging member, and engages with the thread groove.
After the cutter member is engaged, the cutter member is held in its engaged position.

As described above, according to the third aspect,
The cutter member is securely engaged with the pipe joint by the urging force of the urging member, and the pipe joint is securely held at the position where the seal tape is removed, so that the seal tape can be easily and completely removed from the pipe joint. You can do it.

According to a fourth aspect of the present invention, there is provided a jig for removing a sealing tape, in addition to the configuration of the second aspect, wherein the cutter member is formed to allow a pipe joint to pass through the substrate. In the peripheral portion of the support hole, a fixed cutter member fixed with the blade edge protruding into the support hole, and the blade edge is disposed at substantially equal angular intervals with respect to the fixed cutter member and the blade edge protrudes into the support hole. And at least a pair of movable cutter members that are movable in a direction in which the movable cutter members move away from the support holes, and the cutter moving member is a link mechanism that is provided on the movable cutter member and moves the movable cutter member in conjunction with the movable cutter member. It is characterized by:

The jig for removing a seal tape according to the fourth aspect of the present invention provides a jig for removing a pipe joint inserted through a support hole formed in a substrate by using a fixed cutter member and at least one pair of movable cutter members around the pipe joint. It is supported at equal angular intervals and positioned at the seal tape removal position. And
When the pipe joint is inserted into the support hole of the substrate, at least a pair of movable cutter members are operated in conjunction with each other by a link mechanism, and the blade edge of the movable cutter member is moved in a direction to separate from the support hole.

Further, when locking the pipe joint inserted into the support hole, the cutting edge of the movable cutter member is moved in a direction to enter the support hole by the reverse operation of the link mechanism. The same operation is performed when the pipe joint from which the seal tape has been removed is extracted from the support hole of the substrate.

As described above, according to the fourth aspect,
The operation of attaching the pipe joint to the seal tape removing position and removing it from the seal tape removing position can be easily performed, thereby shortening the operation time for removing the seal tape.

According to a fifth aspect of the present invention, there is provided a sealing tape removing jig according to the second aspect of the present invention, wherein at least one of the plurality of cutter members is provided with at least one of the plurality of cutter members. It is characterized by comprising a plurality of cutters arranged so as to be arranged along the axial direction of the pipe joint with which the member engages.

The jig for removing a seal tape according to the fifth aspect of the present invention provides a jig for removing a pipe joint at a position where a seal tape is removed from a support hole in a support hole of a substrate by locking the pipe joint from substantially equal angular intervals around the pipe joint. By engaging a plurality of cutters arranged in a line along the axial direction of the pipe joint with the thread groove of the pipe joint, the pipe joint is also supported in its axial direction.

Thus, according to the fifth aspect,
Since the pipe joint attached at the position where the seal tape is removed is also supported in its axial direction, the axis of the pipe joint does not shift during the removal of the seal tape, thereby completely removing the seal tape. I can do it.

According to a sixth aspect of the present invention, there is provided a jig for removing a sealing tape according to the first aspect of the present invention, wherein the support member is inserted into the pipe joint to remove the pipe joint. A shaft member rotatably supported around an axis, wherein the cutter member is engaged with a thread groove of a pipe fitting externally fitted to the shaft member.

In the jig for removing a seal tape according to the sixth aspect of the invention, the pipe joint around which the seal tape is wound is externally fitted to a shaft member serving as a support member and supported rotatably around the axis.
With the cutter member engaged with the thread groove of this pipe joint,
The pipe joint is rotated about the shaft member.

[0027] As a result, the cutter member relatively moves along the thread groove of the pipe joint, whereby the seal tape attached to the thread groove is peeled off by the cutter member.

As described above, according to the sixth aspect,
Even if the sheet tape is strongly pressed into the thread groove of the pipe joint due to the pressure at that time when the pipe joint is tightened into the pipe, this seal tape can be easily peeled from the thread groove. Thereby, the sealing tape can be completely removed from the pipe joint, and the working time for the removal can be greatly reduced.

According to a seventh aspect of the present invention, there is provided a jig for removing a seal tape, in addition to the configuration of the first aspect, wherein the jig for removing the seal tape is moved toward an engagement position between the cutter member and a thread groove of a pipe joint. And a compressed air injection member for injecting compressed air.

The jig for removing the seal tape according to the seventh aspect of the present invention provides a jig for removing the seal tape when the pipe joint is rotated around its axis and the seal tape is peeled off by the cutter member engaged with the thread groove. Compressed air is blown from the compressed air injection member toward the engagement position between the compressed air and the pipe joint.

As described above, according to the seventh aspect,
Since the seal tape peeled off from the thread groove of the pipe joint is blown off by the compressed air blown from the compressed air injection member, the seal tape can be more completely removed from the pipe joint.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 3 show a first example of an embodiment of a seal tape removing jig according to the present invention. FIG. 1 shows a seal tape removing portion A of the seal tape removing jig 1 as viewed from above. FIG. 2 is a side view of the sealing tape removing jig 1 as viewed from the side, and FIG. 3 is a cross-sectional view taken along line III-III of FIG.

In FIGS. 1 and 2, the plate-shaped substrate 2 has an inner diameter larger than the outer diameter of the threaded portion of the pipe joint, which is symmetrical with respect to the removal of the seal tape, and penetrates the substrate 2 in the vertical direction. A circular support hole 2A is formed.
In the substrate 2, an upper fixed blade 3 is provided on the upper surface of the peripheral portion of the support hole 2A, and a cutting edge 3A formed at the tip thereof is provided with a support hole 2A.
Are fixed in such a manner as to project into the support hole 2A substantially toward the center.

Further, at a position facing the upper fixed blade 3 on the lower surface of the substrate 2, a lower fixed blade 4 is provided with a cutting edge 4 A formed at the tip portion thereof in the support hole 2 A substantially toward the center of the support hole 2 A. It is fixed in a protruding state.

The cutting edge 3A of the upper fixed blade 3 and the cutting edge 4A of the lower fixed blade 4 are located at positions substantially overlapping in the vertical direction. The support hole 2A is provided on the upper surface of the substrate 2.
The lever-shaped first movable blade 5 is rotatably mounted in the horizontal plane at a position opposite to the mounting position of the upper fixed blade 3 with the base end thereof connected by a bolt screw B1. A lever-shaped second movable blade 6 is rotatably mounted in a horizontal plane at a position adjacent to the first movable blade 5 by connecting a central portion thereof with a bolt screw B2.

Further, a connecting rod 7 is rotatably connected at one end to the center of the first movable blade 5 by a bolt screw B3, and the other end is connected to the distal end of the second movable blade 6. The board 2, the first movable blade 5, the connecting rod 7, and the second movable blade 6 constitute a four-joint link mechanism which is relatively rotatably connected by the bolt screw B4.

The first movable blade 5 has a cutting edge 5A protruding into the support hole 2A toward the center of the support hole 2A on the side of the base end on the support hole 2A side. A pressing plate 5 </ b> B that rises perpendicularly upward from the first movable blade 5 is fixed to the distal end. Further, a tension spring 8 is provided between the tip of the first movable blade 5 and a corner (upper left corner in FIG. 1) of the substrate 2 opposite to the side on which the first movable blade 5 is attached. Both ends are interposed by being connected to each other, whereby the first movable blade 5 is oriented such that the cutting edge 5A projects into the support hole 2A around the bolt screw B1 (clockwise direction in FIG. 1). It is urged to rotate.

At the tip of the second movable blade 6, the first movable blade 5
A cutting edge 6A protruding into the support hole 2A substantially toward the center of the support hole 2A is formed so as to face the cutting edge 5A. The cutting edge 5A of the first movable blade 5 and the cutting edge 6A of the second movable blade 6 are arranged so as to be located at equal angular intervals of approximately 120 degrees with the cutting edges 3A and 4A of the upper fixed blade 3 and the lower fixed blade 4. In the standby state, the first movable blade 5 is urged clockwise in FIG. 1 by the tension spring 8, and the second movable blade 6 is also urged clockwise via the connecting rod 7. As a result, it protrudes into the support hole 2A. Then, the pressing plate 5B is pressed in the counterclockwise direction in FIG. 1 to rotate the first movable blade 5 against the tension force of the tension spring 8, and the second movable blade 6 also moves through the connecting rod 7. By turning in the counterclockwise direction in 1, each cutting edge 5 </ b> A and cutting edge 6 </ b> A are moved in a direction to separate from the inside of the support hole 2 </ b> A.

The seal tape removing section A having the above-described structure.
Are horizontally supported by the support portion B. That is, as can be seen from FIG.
A pair of side plates 11 </ b> A and 1 </ b> A standing upright on the base 10 in parallel with each other at the same interval as the width of the substrate 2.
1B. And the side plate 11A
11B are connected to the lower surfaces of both sides of the substrate 2 to support the substrate 2 horizontally above the base 10 at a required interval.

On the base 10, on both sides (left and right sides in FIG. 2) of the space between the side plates 11A and 11B, the side plates 1
At a position intermediate between 1A and 11B, a pair of purge pipes 12 and 13 are erected so as to extend vertically upward with respect to the upper surface of the base 10. The purging pipes 12 and 13 have front end openings 12A and 13A, respectively.
Are bent inward each other so as to face the center of the support hole 2A of the substrate 2, and the lower end thereof is communicated with an air conduction path 10A formed in the base 10. And
A cock valve 14 is connected to an air passage 10 </ b> A of the base 10 by a nipple 15.
, A compressed air supply source (not shown) is connected.

Next, an operation procedure using the above-described sealing tape removing jig will be described. When removing the seal tape wound around the pipe joint removed from the pipe, first, the pressing plate 5B of the first movable blade 5 is moved in the direction opposite to the direction of tension by the tension spring 8 (in FIG. The first movable blade 5 is rotated about the bolt screw B1 by manually pressing in the clockwise direction. Thereby, as shown in FIG. 4, the cutting edge 5A of the first movable blade 5 is moved in a direction to separate from the support hole 2A of the substrate 2, and the second movable blade 6 is interlocked with the first movable blade 5. Then, similarly, the blade 6A is rotated counterclockwise about the bolt screw B2, and the blade edge 6A is moved in a direction to separate from the support hole 2A of the substrate 2.

Thus, the first movable blade 5 and the second movable blade 5
By rotating the movable blade 6, the support hole 2A of the substrate 2 is formed.
Inside, the cutting edge 5 of the first movable blade 5 and the second movable blade 6
A, 6A and the cutting edges 3A, 4 of the upper fixed blade 3 and the lower fixed blade 4
A space s surrounded by A is expanded to a size in which the screw portion of the pipe joint can be inserted. In this state, the space s in the support hole 2A
Then, the pipe joint J is inserted from above with its threaded portion Ja facing downward. Then, the lower end of the threaded portion Ja of the pipe joint J is provided with each of the cutting edges 3A, 4A, 5A and 6A.
Then, the pressing of the pressing plate 5B of the first movable blade 5 is released in a state where the pressing plate 5B is held at a position opposed to.

As a result, as shown in FIG. 5, the first movable blade 5 and the second movable blade 6 are moved to their original positions by the urging force of the tension spring 8 (clockwise in FIG. 4).
, The cutting edges 3A, 4A, 5A and 6A are respectively engaged with the thread grooves at the upper end of the threaded portion Ja of the pipe joint J. Then, the pipe joint J has the cutting edges 3A, 4A,
5A and 6A, the support holes 2A are supported at substantially equiangular intervals, and further supported by the cutting edges 3A and 4A at positions along the axial direction.
A is held upright in A.

After the pipe joint J is set in the seal tape removing portion A of the seal tape removing jig 1 as described above, a spanner is connected to the hexagon nut Jb of the pipe joint J, and the pipe is connected by the spanner. Turn the joint J counterclockwise. By this rotation, the pipe joint J moves each of the cutting edges 3A,
As 4A, 5A and 6A relatively advance along the thread groove of the threaded portion Ja, they rise along the axial direction, and at this time, the sealing tape pressed into the threaded groove of the threaded portion Ja But each of the cutting edges 3A, 4A, 5A and 6
It is peeled off by A.

Then, each of the cutting edges 3A, 4A, 5A and 6
When A reaches the lower end of the threaded portion Ja, the cock valve 14 is opened after the rotation of the pipe joint J is stopped, and the compressed air supply source connected to the base 10 via the cock valve 14 is opened. The compressed air supplied from the air passage 10A of the base 10 through the air passage 10A of
Compressed air is blown from A and 13A toward the threaded portion Ja of the pipe joint J, respectively. As a result, the remaining residue of the peeled seal tape is blown off from the threaded portion Ja of the pipe joint J.

After the sealing tape is removed from the pipe joint J in this manner, the pressing plate 5B of the first movable blade 5 is connected to the pipe joint J.
The first movable blade 5 and the second movable blade 6 are pressed in the direction opposite to the biasing direction of the
Is rotated to move the respective cutting edge 5A and the cutting edge 6A from the support hole 2A of the substrate 2 in the disengagement direction, thereby releasing the engagement with the threaded portion Ja of the pipe joint J.
From the support hole 2A, and a series of sealing tape removing operations is completed.

In the above-mentioned sealing tape removing operation, an electric drill is used instead of the spanner, as shown by a two-dot chain line in FIG. 5, at the hexagonal nut portion Jb of the pipe joint J set at the sealing tape removing portion A. May be connected to each other, and the driving force of the electric drill may be used to rotate the pipe joint J about its axis.

FIGS. 6 and 7 show a second example of the embodiment of the present invention. In this example, a jig 20 for removing a seal tape includes an upper fixed blade 23 having a blade edge 23A and a blade edge 24 on a substrate 21 having a support hole 21A formed in the center.
A, the lower fixed blade 24 having the cutting edge 25A and the pressing plate 2
5B, a second movable blade 26 having a cutting edge 26A, a connecting rod 27 connecting the first movable blade 25 and the second movable blade 26, and a tension spring 28 are formed as shown in FIGS. It is attached in the same manner as the sealing tape removing jig 1 in the example.

An arm 21B is formed integrally with the substrate 21 on the side of the substrate 21 opposite to the side where the first movable blade 25 and the second movable blade 26 are arranged. As can be understood from FIG. 7, on the lower surface of the arm 21B, a bracket 21C having an L-shaped cross section extends parallel to the arm 21B at a required interval with a horizontal portion, and the distal end side (the right side in FIG. 7) is provided. It is fixed in the open state.

Further, the screw shaft 22 is connected to the arm 21B by being screwed into a screw hole formed in a portion facing the horizontal portion of the bracket 21C. At the upper end of the screw shaft 22, a rotating lever 2 is provided.
2A is attached, and an arm 21B is provided at the lower end.
A disc-shaped pressing plate 22B is rotatably connected to the screw shaft 22 so as to be positioned between the screw shaft 22 and the bracket 21C.

The jig 20 for removing the seal tape is shown in FIG.
As shown in the figure, the screw shaft 22 is rotated by the rotation lever 22A to be lowered while the edge of the worktable B or the like is sandwiched between the arm 21B and the bracket 21C,
By pressing the pressing plate 21B against the upper surface of the worktable B, it is fixed to the worktable B. The sealing tape removing jig 20 in this example can be carried to a work site or the like, and is used by being fixed to a work table B or the like at the work site or the like. The procedure for fixing the sealing tape removing jig 20 to the worktable B and then removing the sealing tape from the pipe joint J is the same as the procedure for the sealing tape removing jig 1 described above.

FIG. 8 shows a third embodiment of the present invention. In this example, the jig 30 for removing the seal tape includes a shaft 3 having the same outer diameter as the inner diameter of the pipe joint J from which the seal tape is to be removed and having a circular cross section on the side wall of the base 31.
2 has its proximal end fixed so as to be horizontal. Then, the cutter 33 is fixed to the base 31 with its cutting edge 33A facing upward so as to be located below the shaft 32.

When the seal tape is removed by the jig 30 for removing the seal tape of this example, the pipe joint J to be removed from the seal tape is removed from the threaded portion Ja side of the shaft 32.
And the tip of the threaded portion Ja is engaged with the cutting edge 33A of the cutter 33. At this time, the cutter 33 has a pipe joint J between the cutting edge 33A and the center position of the shaft 32.
Is set to have the same length as the diameter of the thread groove of the threaded portion Ja. In this state, the hexagon nut Jb of the pipe joint J
The pipe joint J is rotated clockwise by, for example, engaging a span with the pipe joint.

As a result, the cutting edge 33A of the cutter 33 relatively moves along the thread groove of the threaded portion Ja of the pipe joint J (that is, the pipe joint J moves along the shaft 32 in FIG. 8). By sliding in the direction of arrow X), the seal tape pressed against the threaded portion Ja by the cutting edge 33A is peeled off.

In the above-described example, the cutter 33 is slidably attached to the base 31 in a direction parallel to the axial direction of the shaft 32, and when the seal tape is removed, the pipe joint J is removed. The cutter 33 may be configured to slide with the rotation. Further, in order to be able to remove the seal tape of the pipe joint having different outer diameters and inner diameters, several types of shafts 32 having different outer diameters are prepared so that the shafts 32 can be exchanged with the base 31 and the cutters can be removed. It is preferable that the length between the cutting edge 33A of 33 and the center position of the shaft 32 be adjustable.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of an embodiment of the present invention.

FIG. 2 is a side view of the same example.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a plan view showing the same example in a state where a pipe joint is attached.

FIG. 5 is a partial view showing a state in which the pipe joint is supported at a seal tape removing position in the same example.

FIG. 6 is a plan view showing another example in the embodiment of the present invention.

FIG. 7 is a side sectional view showing the same example in a fixed state to a work table.

FIG. 8 is a side view showing still another example of the embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Jig for removing sealing tape 2 ... Substrate 2A ... Support hole 3 ... Upper fixed blade (support member, cutter member, fixed cutter member) 3A ... Cutting edge 4 ... Lower fixed blade (support member, cutter member, fixed cutter member) 4A: blade edge 5: first movable blade (support member, cutter member, movable cutter member) 5A: blade edge 6: second movable blade (support member, cutter member, movable cutter member) 6A: blade edge 7: connecting rod 8 ... Tension spring (biasing member) 10 ... Base 10A ... Air conduction path (compressed air injection member) 11A, 11B ... Side plate 12, 13 ... Purge pipe (compressed air injection member) 14 ... cock valve 15 ... nipple 20 ... seal Tape removing jig 21 ... board 21A ... support hole 21B ... arm 22 ... screw shaft 22A ... rotary lever 22B ... press platen 23 ... upper fixed blade (support member, cutter member, fixed cutter portion) Material: 23A: Blade edge 24: Lower fixed blade (support member, cutter member, fixed cutter member) 24A: Blade edge 25: First movable blade (support member, cutter member, movable cutter member) 25A: Blade edge 26: Second movable Blade (support member, cutter member, movable cutter member) 26A ... blade edge 27 ... connecting rod 28 ... tension spring (biasing member) 30 ... seal tape removing jig 31 ... base 32 ... shaft (support member) 33 ... Cutter (cutter member) 33A ... cutting edge J ... pipe joint Ja ... thread Jb ... hexagon nut

Claims (7)

[Claims] 1. A jig for removing a seal tape wound around a threaded portion of a pipe joint, comprising: a support member for rotatably supporting the pipe joint around its axis; A cutter member that engages with the thread groove of the supported pipe joint and that relatively moves along the thread groove as the pipe joint rotates. . 2. The supporting member is constituted by a plurality of cutter members arranged so as to surround a mounting position of a pipe joint, and the cutter member is added to at least a part of the plurality of cutter members. A cutter moving member that moves in a direction to contact and separate the cutter member is attached,
When the cutter member is moved in the direction away from each other by the cutter moving member, the pipe joint becomes freely insertable between the cutter members, and when the cutter member is moved in the direction approaching each other by the cutter moving member, the cutter member The jig for removing a seal tape according to claim 1, wherein each cutter member engages with a thread groove of the pipe joint inserted between the pipe joints to support the pipe joint from the periphery. 3. The sealing tape removing jig according to claim 2, wherein an urging member for urging the cutter members in a direction to approach each other is attached to the cutter moving member. 4. A fixed cutter member, wherein said cutter member is fixed at a peripheral portion of a support hole formed for allowing a pipe joint to pass through a substrate with a cutting edge protruding into said support hole, and said fixed cutter. At least one pair of movable cutter members are disposed at substantially equal angular intervals with respect to the member, and the cutting edge protrudes into the support hole and is movable in a direction separating from the support hole. 3. The jig for removing a seal tape according to claim 2, wherein the link mechanism is a link mechanism provided on the movable cutter member to move the movable cutter member in conjunction with the movable cutter member. 5. The at least one cutter member among the plurality of cutter members is constituted by a plurality of cutters arranged so as to be arranged along the axial direction of a pipe joint with which the cutter members engage. 3. The jig for removing a seal tape according to 2. 6. The support member is a shaft member that is inserted into the pipe joint to rotatably support the pipe joint around its axis, and the cutter is inserted into a thread groove of the pipe joint externally fitted to the shaft member. The jig for removing a seal tape according to claim 1, wherein the member is engaged. 7. The jig for removing a seal tape according to claim 1, further comprising a compressed air ejecting member for ejecting compressed air toward an engagement position between the cutter member and a thread groove of the pipe joint.